Finding the Fourth Proportional to 2,139.33, 2,945.68 and 1,609

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.33 : 2,945.68 = 1,609 : x
2. Step 2: Convert to fraction form
   2,139.33/2,945.68 = 1,609/x
3. Step 3: Cross multiply
   2,139.33x = 2,945.68 × 1,609
4. Step 4: Simplify right side
   2,139.33x = 4,739,599.12
5. Step 5: Solve for x
   x = 4,739,599.12/2,139.33
6. Step 6: Final answer
   x = 2,215.46